X射线管焦点与灯丝结构的关系研究OA

The structure and size of focal spot are decisive factors affecting the image quality of X-ray tubes.Currently,most research focuses on focal spot modulation by adjusting the electron beam focusing system to alter the electric field distribution between the anode and cathode.In this study,the shape and size of the focal spot are adjusted by modifying the structural parameters of the cathode filament.It conducts a detailed analysis of how the anode electron beam focal spot varies with filament structural parameters,including pitch,winding diameter,and solenoid length.Creatively,it proposes a method of segmenting the filament during electron trajectory simulation,enabling independent tracking of the thermal electron trajectories of each filament segment and their corresponding landing positions on the anode target surface.These efforts provide a novel approach for precise control of the focal spot size and shape of X-ray tubes.